InterviewSolution
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InterviewSolution
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If `Cu^(2+) and Cd^(2+)` both are present , it is difficult to outline a scheme to analyes in a mixture |
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Answer» `KCN` form comples with `Cu^(2+)` and `Cu^(2+)` `Cu^(2+) + KCN rarr K_(2) underset("Stable")([Cu(CN)_(4)])` `Cd^(2+) + KCN rarr K_(2)underset("Unstable")([Cu(CN)_(4)])` when `H_(2)S` gas pased anstable complex of `Cd^(2+)` given yellow ppt `[Cu(CN)_(4)]^(2) = Cd^(2+) , Cd^(2+) + S^(2-) rarr underset("Yellow") (CdS) darr` |
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